World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
68
Citations
11599
World Ranking
6743
National Ranking
2023

David B. Collum publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where David B. Collum sits on this spectrum.

61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61 publications 1,295+

This scientist: 190 publications — 29th percentile

29% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

David B. Collum D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where David B. Collum sits on this spectrum.

40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40 D-Index 159+

This scientist: 68 D-Index — 64th percentile

64% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

Overview

David B. Collum is affiliated with Cornell University in the United States. Their research spans the fields of Chemistry and Materials Science with significant focus on Organic Chemistry and Materials Chemistry. They have contributed to related subfields including Spectroscopy, Molecular Biology, and Inorganic Chemistry.

The scientist's work covers several main topics, notably:

  • Coordination Chemistry and Organometallics
  • Crystallization and Solubility Studies
  • Chemical Reaction Mechanisms
  • Asymmetric Synthesis and Catalysis
  • X-ray Diffraction in Crystallography
  • Chemical Synthesis and Analysis
  • Solid-state spectroscopy and crystallography

Frequently publishing in leading venues, David B. Collum has several papers in the Journal of the American Chemical Society, with a total of seven publications there. Other common publication venues include The Cambridge Structural Database, Synthesis, The Journal of Organic Chemistry, and Organic Chemistry Frontiers.

Some notable recent papers include:

  • "Structure, Reactivity, and Synthetic Applications of Sodium Diisopropylamide," 2020, Synthesis
  • "Aggregation and Solvation of Sodium Hexamethyldisilazide: Across the Solvent Spectrum," 2021, The Journal of Organic Chemistry
  • "Sodium Hexamethyldisilazide: Using 15N-29Si Scalar Coupling to Determine Aggregation and Solvation States," 2020, Journal of the American Chemical Society
  • "Ketone Enolization with Sodium Hexamethyldisilazide: Solvent- and Substrate-Dependent E-Z Selectivity and Affiliated Mechanisms," 2021, Journal of the American Chemical Society
  • "Reactions of Sodium Diisopropylamide: Liquid-Phase and Solid-Liquid Phase-Transfer Catalysis by N,N,N',N",N"-Pentamethyldiethylenetriamine," 2021, Journal of the American Chemical Society

David B. Collum has collaborated frequently with several researchers, including:

  • Ryan A. Woltornist
  • Nathan M. Lui
  • Samantha N. MacMillan
  • Yun Ma
  • Jesse A. Spivey

Best Publications

  • Method of Continuous Variations: Applications of Job Plots to the Study of Molecular Associations in Organometallic Chemistry[**]

    Joseph S. Renny;Laura L. Tomasevich;Evan H. Tallmadge;David B. Collum

  • Synthesis of alternating hydroxy- and methyl-substituted hydrocarbons by oxymercuration of cyclopropylcarbinols

    David B. Collum;W. Clark. Still;Fariborz. Mohamadi

  • Is N,N,N',N'-tetramethylethylenediamine a good ligand for lithium?

    David B. Collum

  • Solution structures of lithium dialkylamides and related N-lithiated species: results from lithium-6-nitrogen-15 double labeling experiments

    David B. Collum

  • Lithium diisopropylamide: solution kinetics and implications for organic synthesis.

    David B. Collum;Anne J. McNeil;Antonio Ramirez

  • Lithium Ephedrate-Mediated Addition of a Lithium Acetylide to a Ketone: Solution Structures and Relative Reactivities of Mixed Aggregates Underlying the High Enantioselectivities

    Andrew Thompson;Edward G. Corley;Martha F. Huntington;Edward J. J. Grabowski

  • Lithium Hexamethyldisilazide: A View of Lithium Ion Solvation through a Glass-Bottom Boat

    Brett L. Lucht;David B. Collum

  • Effects of lithium salts on the stereochemistry of ketone enolization by lithium 2,2,6,6-tetramethylpiperidide (LiTMP). A convenient method for highly E-selective enolate formation

    Patricia L. Hall;James H. Gilchrist;David B. Collum

  • Mixed aggregation of lithium enolates and lithium halides with lithium 2,2,6,6-tetramethylpiperidide (LiTMP)

    Patricia L. Hall;James H. Gilchrist;Aidan T. Harrison;David J. Fuller

  • Synthesis of the polyether antibiotic monensin. 2. Preparation of intermediates

    David B. Collum;John H. McDonald;W. Clark Still

  • The structure of lithium tetramethylpiperidide and lithium diisopropylamide in the presence of hexamethylphosphoramide: structure-dependent distribution of cyclic and open dimers, ion triplets, and monomers

    Floyd E. Romesberg;James H. Gilchrist;Aidan T. Harrison;David J. Fuller

  • Lithium diisopropylamide-mediated ortholithiations: lithium chloride catalysis.

    Lekha Gupta;Alexander C. Hoepker;Kanwal J. Singh;David B. Collum

  • Are n-BuLi/TMEDA-Mediated Arene Ortholithiations Directed? Substituent-Dependent Rates, Substituent-Independent Mechanisms

    Scott T. Chadwick;Roger A. Rennels;Jennifer L. Rutherford;David B. Collum

  • Structure of lithium hexamethyldisilazide in the presence of hexamethylphosphoramide. Spectroscopic and computational studies of monomers, dimers, and triple ions

    Floyd E. Romesberg;Max P. Bernstein;James H. Gilchrist;Aidan T. Harrison

  • Determination of structures of solvated lithium dialkylamides by semiempirical (MNDO) methods. Comparison of theory and experiment

    Floyd E. Romesberg;David B. Collum

  • Kinetic cyanations of ketone enolates

    Daniel Kahne;David B. Collum

  • Structure and reactivity of lithium diisopropylamide (LDA) in hydrocarbon solutions. Formation of unsolvated ketone, ester, and carboxamide enolates

    Yong Joo Kim;Max P. Bernstein;Angela S. Galiano Roth;Floyd E. Romesberg

  • Structure and Reactivity of Lithium Diisopropylamide in the Presence of N,N,N',N'-Tetramethylethylenediamine

    Max P. Bernstein;Floyd E. Romesberg;David J. Fuller;Aidan T. Harrison

  • Lithium Diisopropylamide-Mediated Enolizations: Solvent-Independent Rates, Solvent-Dependent Mechanisms

    Xiufeng Sun;David B. Collum

  • Structure and reactivity of lithium diisopropylamide (LDA). The consequences of aggregation and solvation during the metalation of an N,N-dimethylhydrazone

    Angela S. Galiano-Roth;David B. Collum

  • ETHEREAL SOLVATION OF LITHIUM HEXAMETHYLDISILAZIDE : UNEXPECTED RELATIONSHIPS OF SOLVATION NUMBER, SOLVATION ENERGY, AND AGGREGATION STATE

    Brett L. Lucht;David B. Collum

  • Structure and reactivity of lithium diphenylamide. Role of aggregates, mixed aggregates, monomers, and free ions on the rates and selectivities of N-alkylation and E2 elimination

    Jeffrey S. DePue;David B. Collum

Frequent Co-Authors

Floyd E. Romesberg
Floyd E. Romesberg Scripps Research Institute
Brett L. Lucht
Brett L. Lucht University of Rhode Island
Emil B. Lobkovsky
Emil B. Lobkovsky Cornell University
W. Clark Still
W. Clark Still Columbia University
Paul G. Williard
Paul G. Williard Brown University
Trevor W. Hayton
Trevor W. Hayton University of California, Santa Barbara
Daniel Kahne
Daniel Kahne Harvard University
Edward J. J. Grabowski
Edward J. J. Grabowski MSD (United States)
Sol M. Gruner
Sol M. Gruner Cornell University
Héctor D. Abruña
Héctor D. Abruña Cornell University

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

For students studying Chemistry in the USA, exploring related fields like forensic science can open diverse career opportunities. Many professionals combine chemistry knowledge with forensic techniques, making an online masters forensic psychology degree a valuable option. This specialization bridges scientific analysis and criminal investigations.

Career options in this area are extensive, ranging from forensic laboratory technician roles to crime scene analysts. Reviewing forensic careers can help students understand the skills needed and sectors hiring chemistry graduates with forensic expertise.

Cost is often a key consideration. Those interested in law enforcement or criminal justice paths alongside their chemistry background might find it helpful to research criminal justice degree cost to plan their education investment wisely. Many programs offer flexible online learning tailored for working professionals.

For those at the beginning of their higher education journey, pursuing an online associate degree in criminal justice can be a practical first step. It complements chemical expertise and enhances employability in various public safety-related roles.

Best Scientists Citing David B. Collum

Trending Scientists